Apparatus for automatically feeding boilers.



' No. 817,037. PATENTED APR. 3, 1906.

G. BRANDSTETTER MR. FREUND. APPARATUS FOR AUTGMATIGALLY FEEDING BOILERS.

APPLICATION FILED NOV. 15, 1905.

intro rarns GEORG BRANDSTETTER, OF GRATZ, AND RICHARD FREUND, OF VIENNA,

AUSTRIA-HUNGARY. 1

APPIRATUS FOIR AUTOMATICALLY FEEDING BOILERS.

Specification of Letters Patent.

Patented April 3, 1906.

Application filed November 15,1905. Serial No. 287,543.

To aZl whom it may concern.-

Be it known that we, Gnone BRANDSTET- TER, residing at Gratz, and RICHARD FREUND, residing at Vienna, in the Empire of Austria- Hungary, subjects of the Emperor of Austria- Hungary, have invented certain new and useful Improvements in Apparatus for Automatically Feeding Boilers; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention has for its object means for automatically feeding boilers.

Figure 1 of the drawings shows diagrammatically a constructional form of the apparatus in accordance with the invention, and Fig. 2 represents another constructional form of the same.

A cylinder A communicates, by means of the pipes r and T with the boiler K to be supplied and is mounted in such a manner that when the normal water-level N l/V in the boiler is attained the cylinder A is exactly full. The rod 25 of the piston 71', working in the cylinder A, passes through a stuffing-box h, arranged on the bottom of the cylinder, into a chamber Z, which constitutes the widened continuation of the force-pipe of the feed-pump S. The end of the piston-rod 15 extending into the chamber Z (which rod may be formed as a slide-valve) is guided in the tube '11, which communicates with the boiler by means of the conduit Z and the nonreturn valve R. The forcing-valve d of the feed-pump is arranged in this conduit Z During the suctionstrol-:e of the pump S the piston 76, supported by the spring is displaced approximately into the position shown, when the opening of the pipe Z into the pipe i is covered by the extremity of the pistonrod t. The displacement to the right hand of the piston taking place under the influence of the spring f is limited by the stops a, arranged on the piston-rod t. Upon the return stroke, on the other hand, the piston-rod t and the piston 7c are displaced toward the left hand, whereupon the end of the pistonrod tuncovers the mouth of the conduit Z where it opens into the pipe '11, so that the feedwater is forced through the valve (1, the conduit Z and the non-return valve R into the boiler K. The more closely the level of the Water in. the boiler approaches the normal level the more the cylinder is filled and the larger is the water-cushion opposing the lefthand displacement of the piston. As soon as the normal water-level is reached the cylinder A is completely filled, and the piston 7c is then only able to move toward the left hand until it covers the mouth m of the pipes 1" and 1*, which open with two mouths or branches into the cylinder. In this position, however, the end of the pistonrod 15 still covers the opening of the conduit Z into the pipe 'i, so that no feed-water can be forced through the valve (1 into the conduit Z and into the boiler. As the pump S still continues to work, however, the pressure rises in all the conduits and chambers of the pump, so that the diaphragms p in a chamber 0 in free communication with the pump-cylinder is lifted in overcoming its load-spring, whereby the vertically-guided rod q, connected with this diaphragm p, opens the suction-valve s, and the water sucked by the pump is forced back again. If the water-level in the boiler and the cylinder A falls, the stroke of the piston becomes greater, the opening of the conduit Z into the pipe i is uncovered during the forcing stroke of the suction-purine, and water is again forced into the boiler. The pressure then falls in the conduits and chambers of the feed-pump, so that the diaphragm p is returned to its normal position by the spring f.

In the constructional form of the apparatus illustrated in Fig. 2 the diaphragm p is replaced by a spring-controlled piston. A special motor D is provided for operating the feed-pump. When the normal water-level is attained and the pressure in the pump and its conduits rises above the permissible amount, the piston p is lifted in overcoming the pressure of the spring the rod q actuating an obturating member V, which is arranged in the pipe supplying the motor medium to the motor D, so that the pump comes to rest. If the pump is electrically oper ated, the movement of the rod g may be transmitted to a switch for the purpose of stopping the motor. As soon as the waterlevel falls, and with it the pressure, the piston p is forced back by the spring f and the obturating member V is opened. The motor D again begins to act and actuates the pump, feed-water being again forced into the boiler.

If it should be desired in special case to force feed-water into the boiler even after the normal water-level has been attained, a conduit r opening at the bottom of the cylinder A, may be provided. By opening the obturating member a, arranged in this conduit, the space between the piston 7c and the bottom of the cylinder is placed freely in communication with the boiler K, so that when the piston moves toward the left-hand water is forced out of the cylinder A and a further supply of feed water is effected through the valve (Z and the conduit Z The conduit 1 might also lead from the bottom of the cylinder A to the pipe 7', in which case an obturating member must be provided in front of the opening of the pipe r into the cylinder A, this obturating member being closed when the supply of feed-water is to be effected automatically.

We claim 1. A device for automatically supplying feed-water to boilers comprising a suction and force pump, a conduit leading from the forcing end of the pump to the boiler, a forcing-valve in said conduit, a cylinder in communication with the boiler, said cylinder being arranged at the height of the normal water-level, a piston working in the cylinder and means adapted to cut off the flow of water from the pump to the forcing-valve when the normal water-level is reached in the boiler, said means being connected with the piston as and for the purpose described.

2. A device for automatically supplying feed-Water to boilers comprising a suction and force pump, a conduit leading from the forcing end of the pump to the boiler, a forcing-valve in said conduit, a cylinder in communication with the boiler, said cylinder being arranged at the height of the normal water-level, a piston working in the cylinder and means adapted to cut off the flow of water from the pump to the forcing-valve, said means being connected with the piston, a chamber in free communication with the pump-cylinder, an elastically-yielding wall in such chamber and means adapted to make the pump inactive when the normal waterlevel in the boi er has been reached, said means being operated by the elasticallyyielding wall, when the water-pressure in the pump rises as and for the purpose described.

3. A device for automatically supplying feed-water to boilers comprising a suction and force pump, a conduit leading from the forcing end of the pump to the boiler, a forcing-valve in said conduit, a cylinder in communication with the boiler and arranged at the height of the normal water-level, a piston working in said cylinder, means adapted to cut off the flow of water from the pump to the forcing-valve said means being in connection with the piston, a chamber in free communication with the pump-cylinder, an

elastically-yieldmg wall in such chamber and means for opening the suction-valve of the pump, said means being operated by the elastically yielding Wall when the waterpressure in the pump rises as and for the purpose described.

4. A device for automatically supplying feed-water to boilers comprising a suction and force pump, a conduit leading from the forcing end of the pump to the boiler, a forcing-valve in said conduit, a cylinder in communication with the boiler and arranged at the height of the normal water-level, a piston working in said cylinder, means adapted to cut off the flow of water from the pump to the forcing-valve said means being in connection with the piston, a chamber in free communication with the pump-cylinder, an elastically-yielding wall in such chamber and means for stopping the motor operating the feed-pump by the cutting off of the motor medium said means being actuated by the elastically-yielding wall when the water-pres sure in the pump rises as and for the purpose described.

5. A device for automatically supplying feed-water to boilers comprising a suction and force pump, a conduit leading from the forcing end of the pump to the boiler, a forcing-valve in said conduit, a cylinder in communication with the boiler and arranged at the height of the normal waterlevel, a piston working in said cylinder, means adapted to cut off the flow of water from the pump to the forcing-valve, said means being in connection with the piston, a chamber in free communication with the pump-cylinder, an elastically-yielding wall in such chamber and means adapted to make the pump inactive, said means being operated by the elasticallyyielding wall, one or more pipes leading from the cylinder in communication with the boiler to the latter and obturating member or members in said pipe or pipes whereby the supply of feed-water to the boiler maybe continued even after the normal water-level has been reached substantially as and for the purpose described.

In testimony whereof we aflix our signatures in presence of two witnesses.

GEORG BRANDSTETTER. RICHARD FREUND. WVitnesses:

ARTHUR BAUMANN, W. A. RUBLEE.

ICO

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